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Children's safety is every parents is the most important thing, on child trafficking, we design the oppnent ring to deal with missing children. It is divided into two, parents and children each paragraph, parents can through the bracelet to determine the position of the child and find the child, in the face of danger, the child's bracelet also only parents can unlock, i n order to ensure that the child safety.
Tianjin University of Technology
TianJin, China
Chao Wang,
Tianjin University of Technology
FeiLi Huang,
Tianjin University of Technology
